Improvement in covers for fruit-jars



T. B. & J. S. ATTERBURY.

Fruit-Jar Caver.

No. 30,662. Patented Nov. '20, 1860.

Witnesses. Inventor,

AM. PNDTOLI1'H0- C0. N.Y. (OSBDRNE'S PROCESS.)

central section of the same.

UNITED STATES THOS. B. ATTERBURY AND JAS. S.

PATENT OFFICE.

ATTERBURY, OF PITTSBURG, PA.

Specification forming part of Letters Patent No. 30,662, dated November 20, 1860.

To all whom, it may concern: I Be it known that we, THOMAS B. ATTER- BURY and JAMES S. ATTERBURY, both of Pittsburg, in the county of Allegheny and State of- Pennsylvania, have invented a new and use ful Improvement in Preserve-Jar (lovers; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying I drawings, forming a part of this specification, i in which Figure 1 is a detached perspective view of the cover. Fig. 2 is a perspective view of the jar and cover-fastening. Fig. 3 is a perspecl tive view of the jar, cover-fastening, and the cover all connected; and Fig. 4 is a vertical Similar letters of reference in each of the l several figures indicate corresponding parts. The nature of our invention consists in a metallic ring constructed with a circular shoull der, a vertical screw, and a vertical narrow l slotted lug, in combination with a shouldered and lipped cover, a rubber gasket, a clam piugl nut, and a preservejar with a straight neck, all in the manner and for the purposes hereinafter described.

To enable others skilled in the art to make and use our invention, we will proceed to del scribe its construction and operation. I H is the preservejar. Its neck is vertical. B is the metallic ring, fitted snugly round 1 the neck of the jar. This ring extends up i above the top of the neck of the jar, and has i a circular shoulder or is recessed, as at a, on its inner circumference. \Vithin this recess and l on the top edge of the jar a ring rubber gas- 1 hot, G, is placed, as represented in the draw- I ings. From one point of the circumference of the ring a narrow lug, Z, projects upward, said lug having a slot, 0, cut horizontally through it, and from a diametricallyopposite point of the circumference of the ringaverticalscrew, A, projects upward.

E is the cover of the jar. It is countersunk or made with a circular shoulder, d, on its upper surface and a shoulder, d, on its under l movement of the same.

surface. It also has a narrow curved lip, F, projecting from one point of its circumference. To apply this cover and confine it on the jar, and also make the jar air-tight, the lip F is passed through the slot of the lug b,

and the under shoulder of the cover fitteddown into the mouth of the jar until the flange of the cover rests down upon the rubber gasket. At this stage a clamping thumbnut, D, is placed on the screw A and screwed down until the rubber is fully compressed and closes air-tight the four points 8 ta t.

It will be observed that the farther the screw is forced down the greater will bethe pressure at the points 8 t u c, for the lug b, although it allows the cover to go down, resists all upward It will also be observed that the power of the screw is applied at the greatest possible distance from the fulcru Ill 2), and thus great pressure is exerted upon the rubber gasket. It will-also be observed that the shoulder d of the cover and the sh0ulder a of the ring prevent lateral spreading of the rubber gasket, and thus insures a perfect air-tight joint, and also protects it from contact with the conteuts of the jar. If the rubber were allowed to spread laterally, the joint would not be made tight by continuing to screw down the clamp-nut, and ifit were allowed to come in contact with the fruit it wouldiinpart bad taste to the same.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is-

The arrangement and combination of the preserve jar H, metallic ring B, constructed with a shoulder. a, lug 1), slot 0, and screw A, rubber-ring gasket G, clampuut D, andcover E, constructed with a curved lip, F, and shoulder (Z, all in the manner herein described.

THOMAS B. ATTERBUBY. JAMES S. ATTERBUBY. \Vitnesses:

HUGH WRIGHT, HoMER WRIGHT.

and for the purposes 

